编辑，保存，自修改HTML文档；格式生成的HTML，JavaScript

Z时代
2024-01-10
分类：问答

错误：字符串转义，格式化html，js由最初编辑，保存html，js

例如，

a）如果在本地浏览器中打开“ saveFile.html”；

b）输入“ abc” textarea；

c）点击save file按钮；

d）单击Save在Save File对话框;

e）file-*[date according to universal time].html保存到磁盘上；

f）file-*[date according to universal time].html在浏览器中打开；

g）在“ def”中输入textarea；

h）重复d），e），f）；

i）错误：第二个结果file-*[date according to universal time].html确实显示textarea包含“ abc

def”文本内容； button未显示在html：

// at rendered `html` from second `file-*[date according to universal time].html`
// `textarea` containing "abc def" displayed here , 
// `button` _not_ displayed ; following string displayed following `textarea`:
');"console.log(clone);var file = new Blob([clone], {'type':'text/html'});a.href = URL.createObjectURL(file);a.download = 'file-' + new Date().getTime() + '.html';a.click();};

在第 26 行生成的“ saveFile.html”

+ "var clone = '<!doctype html>'+ document.documentElement.outerHTML.replace(/<textarea>.*<.+textarea>/, '<textarea>'+document.getElementsByTagName('textarea')[0].value+'<\/textarea>');"

“ saveFile.html” v 1.0.0

脚本

<!doctype html>
<html>
<!-- saveFile.html 1.0.0 2015 guest271314 edit, save `html` document -->
<head>
</head>
<body>
<textarea>
</textarea>
<button>save file</button>
<script type="text/javascript">
var saveFile = document.getElementsByTagName("button")[0];
var input = document.getElementsByTagName("textarea")[0];
var a = document.createElement("a");
saveFile.onclick = function(e) {
  var clone = ["<!doctype html><head></head><body><textarea>"
              + input.value
              + "</textarea>"
              + "<button>save file</button>"
              + "<script type='text/javascript'>"
              + "var saveFile = document.getElementsByTagName('button')[0];"
              + "var input = document.getElementsByTagName('textarea')[0];"
              + "var a = document.createElement('a');"
              + "saveFile.onclick = function(e) {"
              + "var clone = '<!doctype html>'+ document.documentElement.outerHTML.replace(/<textarea>.*<.+textarea>/, '<textarea>'+document.getElementsByTagName('textarea')[0].value+'<\/textarea>');"
              + "console.log(clone);"
              + "var file = new Blob([clone], {'type':'text/html'});"
              + "a.href = URL.createObjectURL(file);"
              + "a.download = 'file-' + new Date().getTime() + '.html';"
              + "a.click();"
              + "};"
              + "</scr"+"ipt>"
              + "</body>"
              + "</html>"];
  var file = new Blob([clone], {"type":"text/html"});  
  a.href = URL.createObjectURL(file);
  a.download = "file-" + new Date().getTime() + ".html";
  a.click();
};
</script>
</body>
</html>

回答：

你替换函数替换，直到/textarea>那就是在你的clone变量。它不会从第一个文件开始执行此操作，因为html的textarea之后有换行符。解决它的一种方法是newline在生成的html中添加一个字符。像这样：

var clone = ["<!doctype html><head></head><body><textarea>"
          + input.value
         // add newline here
          + "</textarea>\n"
          + "<button>save file</button>"
          + "<script type='text/javascript'>"
          + "var saveFile = document.getElementsByTagName('button')[0];"
          + "var input = document.getElementsByTagName('textarea')[0];"
          + "var a = document.createElement('a');"
          + "saveFile.onclick = function(e) {"
          + "var clone = '<!doctype html>'+ document.documentElement.outerHTML.replace(/<textarea>.*<.+textarea>/, '<textarea>'+document.getElementsByTagName('textarea')[0].value+'<\/textarea>');"
          + "console.log(clone);"
          + "var file = new Blob([clone], {'type':'text/html'});"
          + "a.href = URL.createObjectURL(file);"
          + "a.download = 'file-' + new Date().getTime() + '.html';"
          + "a.click();"
          + "};"
          + "</scr"+"ipt>"
          + "</body>"
          + "</html>"];